Author
Topic: Aroids (the family Araceae) (Read 34614 times)

Pascal B

I thought you where wrong with the name Arisaema dilatatumbut in the latest review of Arisaemait is mentioned as Arisaema dilatatum and not asArisaema dilitatumI found this name in Aroid Hardiness List from theInternational Aroid Society and a lot of sites are using this namebut in an other part they used the good nameI think I have to change the name in my computer

Roland

The epithet dilatatum refers to the dilated or expanded appendix base. In its close relative elephas the appendix base is already expanded but in dilatatum this is rather extreme and can be almost 2 cm in diameter.

Pascal B

The main difference between tortuosum and heterophyllum can be found in the leaves. The central leaflet ("the middle one") of heterophyllum is shorter than the lateral leaflets, with tortuosum the central leaflet is as long or longer than the lateral leaflets. Heterophyllum usually has a single leaf whereas tortuosum can have upto 3 leaves if big enough. By the look of the leaflets on your picture I would say your plant is Arisaema heterophyllum.

I'd hesitate to suggest a name for any Arisaema among this group of afficianados, but in Reply 164, since no-one else has given an answer, it seems to me very like A. taiwanense, or perhaps something closely related. Both the flower heqd and the foliage suggest that species to me.

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Lesley Cox - near Dunedin, lower east coast, South Island of New Zealand - Zone 9

I'd hesitate to suggest a name for any Arisaema among this group of afficianados, but in Reply 164, since no-one else has given an answer, it seems to me very like A. taiwanense, or perhaps something closely related. Both the flower heqd and the foliage suggest that species to me.

Oh... I look up reply #164, and see that it is my post, a species I showed several photos of, but no forthcoming suggestions about what it might be except yours. Any other suggestions?

Pascal B

I'd hesitate to suggest a name for any Arisaema among this group of afficianados, but in Reply 164, since no-one else has given an answer, it seems to me very like A. taiwanense, or perhaps something closely related. Both the flower heqd and the foliage suggest that species to me.

Oh... I look up reply #164, and see that it is my post, a species I showed several photos of, but no forthcoming suggestions about what it might be except yours. Any other suggestions?

Not if it is from China. My first impression is Arisaema sukotaiense, but that one is from Thailand and not reliably hardy. Section Sinarisaema (the "umbrella-leaved" section) is the worst to make any sensible identifications for as the species bounderies within that section are very muddled and it is near impossible to define a character set to distinguish species on, there are a couple of species that are clearly identifiable by one or 2 unique characters, the rest seems to be a sliding transition from one to the other when you see them in the field and most are lumped into the very polymorphic consanguineum.

Taiwanense is an endemic of Taiwan, sukotaiense is its close relative from N Thailand with the same dark, mahogany brown spathe, the same leaf type with drooptips but differing in a smooth appendix among other things. The appendix of taiwanense is distinctly grooved. I would label it as A. sukotaiense aff. and try to confirm its origin if I were you Mark.

Of the several Arisaema in my garden this is my favourite: Arisaema sp. 'Makalu'. It produces this almost black bloom followed by huge very decorative leaves. They are yet to unfirl and get to full size but you can see the pale edges as they begin to unfurl.. I will post a photo when they are fully expanded.It was given to me by Janet Wheatcroft of Craigieburn Garden about 10 years ago. She collected it in 1995 from the remote Makalu area of East Nepal.